38 Gigabytes of Tenant Trust, Gone in a Day
What Happened
In December 2024, Tri County Property Management, based in Sandwich, Illinois, was breached, with attackers removing roughly 38 gigabytes of data from its systems. Property managers sit on exactly what criminals want: tenant Social Security numbers, bank account and payment records, lease files, and applicant background data. The same pattern played out at Income Property Management, where a single intrusion exposed driver’s licenses, Social Security numbers, dates of birth, medical details, and even passport numbers, and the firm did not notify affected people until more than a year later.
Where It Went Wrong
A property management company is a data business whether it thinks of itself that way or not. When tenant and owner records are stored without continuous monitoring, strong access controls, and a breach-response plan, a single compromised account can expose thousands of residents and trigger long, expensive notification obligations.
How Red Door Shield Stops This
Keep what's valuable secure
Identity and access controls plus enforced multi-factor authentication keep tenant and owner records behind verified logins, not a single reused password.
Inspect what's coming in
Continuous monitoring and dark web scanning catch compromised credentials and unusual data access before 38 gigabytes can walk out the door.
Trust through validation
Verified payment workflows and documented data-handling policies protect rent and security-deposit transfers and prove the firm met its obligations to residents and investors.
The Takeaway
The firms that handle the most sensitive data are often the ones least equipped to protect it. The fix is not more software to manage. It is one partner watching the door so the team can keep managing properties.
Related Case Studies
When Tax Season Becomes Open Season
In April 2024, Legacy Professionals LLP, an accounting firm based in Westchester, Illinois, just outside Chicago, was breached by the LockBit 3.0 ransomware group. Over two days, the attackers moved through the firm’s network and quietly copied files before anyone noticed. Those files held names, Social Security numbers, driver’s license numbers, and medical and health insurance details for 216,752 people. That August, the criminals published the stolen data on the dark web. The firm did not finish notifying affected individuals until early 2025, and it now faces class-action lawsuits over the breach and the delay.
Four Invoices, $445,000, One Spoofed Vendor
In 2024, attackers impersonated a vendor working on the Town of Arlington, Massachusetts high school building project. Using phishing, spoofed email, and a compromised account, they inserted themselves into the payment process and supplied new wiring instructions. Four monthly payments totaling $445,945 went to the criminals before the real vendor reported, in February, that it had never been paid. Investigators later found additional interception attempts on the same project totaling roughly $5 million. The town’s bank was able to recover just $3,308, about six percent of the loss.
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